Tension loss

Is it normal that the tension right after stringing babolat pro hurricane tour 15L in a racket at 59.5 lbs is only 56.6 lbs. (Using racquettune app)
Is it me doing a bad string job, my machine being badly calibrated or is it normal?
I'm using a constant pull machine but I've actually never bothered to calibrate it.

Is it normal that the tension right after stringing babolat pro hurricane tour 15L in a racket at 59.5 lbs is only 56.6 lbs. (Using racquettune app)
Is it me doing a bad string job, my machine being badly calibrated or is it normal?
I'm using a constant pull machine but I've actually never bothered to calibrate it.

On a related subject: In topics where they discuss tensions, when someone says he uses 55 lbs it actually means his real tension would be a only 50.
Same thing for the pro's. Is the 21 kgs Fed plays 21 kgs on the machine or 21 kgs real tension?

On a related subject: In topics where they discuss tensions, when someone says he uses 55 lbs it actually means his real tension would be a only 50.
Same thing for the pro's. Is the 21 kgs Fed plays 21 kgs on the machine or 21 kgs real tension?

Click to expand...

Not at all. There are so many variables when it comes to stringing that not one thing is accurate.
Difference in climate.
Difference in stringer technique.
Difference in pull speed.
etc.

Is it normal that the tension right after stringing babolat pro hurricane tour 15L in a racket at 59.5 lbs is only 56.6 lbs. (Using racquettune app)

Click to expand...

If every time you string the same racquet with the same string at the same tension, you get the same reading from racquetTune, then yes, it's normal.

Whilst racquetTune is designed to give a reading close to the reference tension on the machine, it really doesn't matter whether it does or not. What does matter is that the results are consistent, which will indicate that you're producing a consistent string job.

However, if the numbers are important to you, then one question I will ask: are you measuring the string factor, or using one of the generic pre-sets? That can make quite a difference in the reading you achieve.